Just booked the following:
2/14 LAX-DOH 15:00-18:00+1 QR 740 772 R
2/15 DOH-SIN 20:40-09:15+1 QR 942 359 R
2/21 SIN-DOH 10:45-13:50__ QR 943 359 R
<Overnight>
2/22 DOH-LAX 08:00-13:15__ QR 739 772 R
$1721.11 for 1 person. Booked via QR's website, no VISA code used.